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smart-security-system.ino
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smart-security-system.ino
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#include <SPI.h>
#include <MFRC522.h>
#include <Servo.h>
#include <SoftwareSerial.h>
SoftwareSerial espSerial(2, 24);
#define SS_PIN 9
#define RST_PIN 8
#define Buzz 7
#define IR 6
MFRC522 mfrc522(SS_PIN, RST_PIN);
Servo s1;
Servo s2;
int ppm;
int val = 0 ;
const int MQ5_PIN = A1;
const int co2 = A2;
const int thres_co2 = 450;
const int thres_co = 400;
const int rain = 48;
// Create MFRC522 instance.
void LPG_check(){
Serial.print("LPG :"+ppm);
}
void updateSerial()
{
delay(500);
while (Serial.available())
{
//Forward what Serial received to Software Serial Port
}
}
void msgSend(String err){
}
void setup()
{
espSerial.begin(115200);
pinMode(22, OUTPUT);
digitalWrite(22, HIGH);
Serial.begin(9600); // Initiate a serial communication
SPI.begin(); // Initiate SPI bus
mfrc522.PCD_Init(); // Initiate MFRC522
Serial.println("Approximate your card to the reader...");
Serial.println();
s1.attach(3);
s2.attach(49);
s1.write(0);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(IR, INPUT);
pinMode(Buzz, OUTPUT);// buzzer
pinMode(2, OUTPUT); //redlight
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(13, OUTPUT);
pinMode(rain, INPUT);
pinMode(51, OUTPUT); //motor
}
void loop()
{
if(digitalRead(rain) == 0){
digitalWrite(13, HIGH);
digitalWrite(Buzz, HIGH);
}
else{
digitalWrite(13, LOW);
digitalWrite(Buzz, LOW);
}
int sensorValue = analogRead(MQ5_PIN); // Read the analog value from MQ-5 sensor
float voltage = sensorValue * (5.0 / 1023.0); // Convert the analog value to voltage (assuming 5V reference)
float ppm = 1000.0 * (0.23 * voltage - 0.16);
Serial.println("CO2: "+String(analogRead(A2)));
//LPG_check();
if(digitalRead(IR) == LOW){
digitalWrite(Buzz, HIGH);
digitalWrite(2, HIGH);
delay(5000);
digitalWrite(2, LOW);
}
else{
digitalWrite(Buzz, LOW);
}
int sensorValue2 = analogRead(A0);// print out the value you read:
Serial.println("CO: "+String(sensorValue2)); //carbon monoxide mq7
delay(20); //carbon monoxide mq7
if (sensorValue2 > 500){
espSerial.println("Alert! <br> <b>Something is burning in Completely.</b> <br><i> <u> Sensor Found high amount of CO </u></i>");
digitalWrite(22, LOW);
digitalWrite(7, HIGH);
digitalWrite(47, 1);
digitalWrite(Buzz, HIGH);
digitalWrite(8, HIGH);
s2.write(135);
digitalWrite(51, HIGH);
delay(5000);
}
else{
digitalWrite(47, LOW);
digitalWrite(Buzz, LOW);
s2.write(0);
digitalWrite(22, HIGH);
digitalWrite(51, LOW);
}
if (sensorValue > 350){
espSerial.println("Alert! <br> <b>Your Home is about to blast.</b> <br><i> <u> Sensor Found leakage of lpg </u></i>");
digitalWrite(7, LOW);
digitalWrite(Buzz, HIGH);
digitalWrite(8, LOW);
digitalWrite(10, HIGH);
s2.write(135);
digitalWrite(22, LOW);
delay(5000);
}
else{
digitalWrite(10, LOW);
digitalWrite(Buzz, LOW);
digitalWrite(22, HIGH);
s2.write(0);
}
if(analogRead(A2)>thres_co2){
espSerial.println("Alert! <br> <b>Fire, Something is burning. Be Alert .</b> <br><i> <u> Sensor Found High Amount of CO2</u></i>");
//co2
digitalWrite(Buzz, HIGH);
digitalWrite(7, HIGH);
digitalWrite(12, 1);
s2.write(135);
digitalWrite(22, LOW);
}
else{
digitalWrite(12, LOW);
s2.write(0);
digitalWrite(22, HIGH);
delay(300);
}
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent())
{
return;
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial())
{
return;
}
//Show UID on serial monitor
("UID tag :");
String content= "";
byte letter;
for (byte i = 0; i < mfrc522.uid.size; i++)
{
Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
Serial.print(mfrc522.uid.uidByte[i], HEX);
content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
content.concat(String(mfrc522.uid.uidByte[i], HEX));
}
Serial.println();
Serial.print("Message : ");
content.toUpperCase();
if (content.substring(1) == "17 9D D2 4E" || content.substring(1) == "A7 31 D6 4E" || content.substring(1) == "67 A1 E3 4D" || content.substring(1)=="69 9F 20 A3" || content.substring(1)=="A9 D0 4E A3" || content.substring(1)=="79 BE E3 A3") //change here the UID of the card/cards that you want to give access
{
s1.write(135);
digitalWrite(4, HIGH);
Serial.println("Authorized access");
msgSend("Authorized access");
Serial.println();
delay(1000);
s1.write(0);
digitalWrite(4, LOW);
digitalWrite(5, LOW);
}
else {
digitalWrite(5, HIGH);
Serial.println(" Access denied");
delay(3000);
digitalWrite(4, LOW);
digitalWrite(5, LOW);
}
}